Photographic-plate holder.



"0,628,889. Patented July ll, I899. W. H. LEWIS.

PHOTOGRAPH"; PLATE HOLDER.

(Lpplicliion Mid I. 18, 1899.)

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(No Model.)

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UNITED STATES PATENT OEEIcE.

\VILLIAM H. LE\VIS, OF HUNTINGTON, NE\V YORK, ASSIGNOR OF ONE-HALF TO THE E. d II. T. ANTHONY & COMPANY, OF NEIV YORK, N. Y.

PHOTOGRAPHlC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 628,889, dated July 11, 1899.

Application filed March 18, I899. erial No. 709,630. (No model.)

To all whom it may concern: of the metal parts H rest against them a thin Be it known that I, WVILLIAM II. Lnwls, a layer of velvet or similar material to aid in citizen of the United States, and a resident the more complete exclusion of the light. of Huntington, in the county of Suffolk and These metal parts H II are inverted rela- 55 State of New York, have invented a new and tively to one another, so that their edges will useful Improvement in Photographic-Plate interlock, as shown in Fig. 3, and between Holders, of which the following is a SPQOlfiCflthe interlocking edges Ilocate a spring I, the Lion. ends of which are preferably curled up some- Heretofore considerable difficulty has been what, as shown, so they may slide length- 6o 10 encountered in constructing the devices Wise of the parts II, when desired. The funcwhich make the joint between the slides and tion of the spring is to force these metal parts theplate-holder light-tight because of the II outwardly at. all times and into contact delicacy of the parts and their liability to with the dark slides B. Iprefer to bevel the become disarranged and in some instances upper and under edges of these metal parts, 65 broken. This difficulty has particularly as shown in Fig. S-that is to say, having an arisen in cases where the apparatus is used inclined surface K K presented outwardlyby amateurs, who frequently do not 'appreso that as the dark slides are inserted they ciate the delicacy of the parts and the care will impinge upon this inclined or beveled with which they should be used. surface and press backwardly the metal parts 70 In the drawings hereof, Figure 1 is a plan H with greater smoothness and certainty of view, partly broken away, of a plate-holder action. By reference to Fig. 2 it will be seen embodying my invention. Fig. 2 is a vertithat these metal strips II II are located withcal sectional view on the line X X of Fig. 1. in the chamber G, above referred to as being Fig. 3 is a presentation showing the detail of between the cross-bars E and F. 75 2 5 the 1ight-excluding devices. The operation is obvious from what has A illustrates the frame of the plate-holder. been already said, and a further description It may be made in any of the usual forms. is unnecessary. I desire to call attention to B B are the two dark slides. the fact, however, that the sides of the gutter- O is the diaphragm dividing the. platelike parts H H may be nearly as deep as the 80 o holder into two parts, that illustrated in the depth of the chamber G. They are guided drawings being a double plate-holder. and sustained in their movement by impinge- D D are the springs at the rear of the ment against one another and against the plate-holder, which are compressed when the sides of that chamber; also, that the spring plates are inserted and which press them forinterposed between them, being supported 8 5 wardly to enter the rabbet in the crossbar laterally by the inner surfaces of the inter- E at the front end of the holder. locking portions of these metal strips H, will F is the usual cross-bar, between which and be prevented from displacement and be sus the cross-bar E a space G is left. Within tained in proper position, so that itmay more this space the light-excluding devices which effectively exert its pressure upon the parts 0 form the subject-matter of this invention are H II.

located. They are best illustrated in Fig. 3 For the above reasons this light-excluding and are composed of two deep gutter-like device is much more durable and certain in parts II II, which are rolled or swaged from its action than any heretofore known to me, thin metal (preferably brass, aluminium, or and owing to the fact that the parts are or 5 5 the like) into the form shown. The rolling maybe all made of metal they are not affected or swaging operation is done with such ac by atmospheric changes. There is no swellcuracy that the edges of these metal parts ing or contraction, at least none similar to which come in contact with the dark slides that which occurs when these devices embody 13 are absolutely straight, so as to preclude wood in any form, and they are practically 10:) the passage of light, and I prefer to locate on imperishable.

the dark slides at the places where the edges It will be obvious to those who are familiar with this art that, if desired, the parts II II may be made of wood and also that a spring or springs of considerable variety of shapes and construction may be employed instead of'that shown by me and that various other modifications may be made in the details of construction without departing from the es sent-ials of the invention. I, however, do not approve ofthe employment of wood in any form, preferring to use metal for the reasons stated.

I*Ia\"ing-described my invention, I claim- 1. In a double plate-holder the combination of two gutter-shaped devices located within a recess in the plate-holder and supported by its sides and so arranged that their edges int l l i i i i i l tel-lock, and a spring. adapted to separate said gutter-shaped devices, for the purposes set forth. 2. In a double plate-holder the combination of two gutter-shaped devices located within 1 a recess in the plate-holder and supported by its sides and so arranged that the edges of the said devices interlock, and a spring located between and confined by said interlocking edges adapted to separate said gutter-shaped devices, for the purposes set forth.

' 3. In a doubleplate-holderthe combination of two gutter-shaped devices located within a recess in the plate-holder and supported by its sides, the portions of said devices which come in contact with the side of the plateholder being beveled or inclined outwardly, and a spring interposed between said guttershaped devices, for the purposes set forth.

Signed at NewYoi-k, in the county of New York and State of New York, this 16th day of March, A. D. 1899.

WILLIAM II. LEWIS.

W itn esses:

PHILLIPS ABBOTT, D. S. RITTERBAND. 

